This was the quotation in my Google "Quote of the Day" box today:
If there were no God, there would be no Atheists.
- G. K. Chesterton
This seems like an immensely stupid thing to say. I hadn't heard of Chesterton, so I looked him up. Looks like he was a Christian apologist, so this quote probably actually means what it sounds like.
If this works for god, then does it work for everything?
If there were no Santa Claus, then there would be no people who don't believe in Santa Claus.
If the earth were not flat, then there would be no people who didn't think it was flat.
He's basically saying in a roundabout way that because there are people who don't believe in a thing, that thing must exist. In this case, because there are atheists, god exists.
Think about that next time you claim that something doesn't exist (like unicorns, Zeus, or pixie dust). According to Chesterton's little barb, you're actually affirming its existence by saying it doesn't exist.